Structure.py

# Copyright (C) 2002, Thomas Hamelryck (thamelry@vub.ac.be)# This code is part of the Biopython distribution and governed by its# license. Please see the LICENSE file that should have been included# as part of this package. # My Stufffrom Entity import Entity
__doc__="The structure class, representing a macromolecular structure."00014class Structure(Entity):
""" The Structure class contains a collection of Model instances. """def __init__(self, id):
self.level="S"
Entity.__init__(self, id)
# Special methodsdef __repr__(self):
return"<Structure id=%s>" % self.get_id()
# Private methods00029def _sort(self, m1, m2):
"""Sort models. This sorting function sorts the Model instances in the Structure instance. The sorting is done based on the model id, which is a simple int that reflects the order of the models in the PDB file. Arguments: o m1, m2 - Model instances """return cmp(m1.get_id(), m2.get_id())
# Public def get_chains(self):
for m in self:
for c in m:
yield c
def get_residues(self):
for c in self.get_chains():
for r in c :
yield r
def get_atoms(self):
for r in self.get_residues():
for a in r:
yield a